As far as I can tell the BeeCore uses a STM32F3 which we don't support (at the moment)
You could try koduino, https://github.com/avikde/koduino
as their main target processor is the F3.
However there is a lot of variation in the F3 processor range, and the F3 on the BeeCore may not work with Koduino.
(You'd need to ask Avik via github)